An old sea captain takes his young daughter along on a voyage. The sea gets rough, but the captain thinks that he can make his way. When the hurricane hits the Hesperus, the skipper faces shoals and shipwreck. As the captain lashes his daughter to the mast, the sharks and octopi set the table for a meal. The mouse crew is helpless. The mice use doughnuts as life preservers. One member of the crew sends for Mighty Mouse. Mighty hears an SOS, dashes to the rescue and shoos off the sharks. He tows the ship to New York and, in the finale, rides up Broadway in a shower of tickertape.